34 



CHEMISTRY. 



No. 



762 Fig. 537, Gurney's oxy-hydrogen blowpipe, $ 



763 Fig. 538, hydrogen lamp* - $2, $3, and 



764 Fig. 539, hydrogen gas generator, half gallon 



size, - - ,.<:* - $4 and 



765 Fig. 539, hydrogen gas generator, gallon, $5 and 



766 Fig. 540, hydrogen gas pistol, - 



767 Fig. 541, air balloons, for inflation with hy- 



drogen gas, 



12 inches long, 7^ inches diameter, 



15 

 19 

 26 

 30 

 36 



11 

 13 



17 

 21 

 25 



768 Air balloons in the form of a boy, man, ele- 



phant, ox, fish, <fec., $4.50 to 



769 Fig. 542, eolopile, or ether jet, in glass, 



770 " " " in brass, 



771 Fig. 543, deflagrating jar and spoon, quart, 



75 cts. ; half gallon, $1 ; one gallon, 



772 Fig. 544, deflagrating ladle, or spoon, 



773 Fig. 545, Davy's safety lamp, - $2.50 to 



774 Wire gauze for experiments on flame, 25 cts. to 



775 Fig. 546, flameless lamp, - $1.25 to 



776 Fig. 547, pulse glass, - - .*>,. 



777 Fig. 548, boiling glass, r* < - - > ? 



778 Fig. 549, Wollaston's chryophorus, 



779 Fig. 550, apparatus to show specific heat, 



780 Fig. 551, apparatus to show that different 



fluids expand unequally, - - >; . 



781 Fig. 552, conductometer, ... 



782 Fig. 553, instrument to show the expansion of 



metal by heat, 



783 Fig. 554, ball and ring for showing the expan- 



sion of metal by heat, * 



784 Fig. 555, pyrometer, 



785 Fig. 556, fire syringe, in brass, - 



786 Fig. 557, fire syringe, large size, with glass 



barrel for showing the flash of light, 



787 Fig. 558, apparatus to show the downward 



conducting power, of fluids, - -. <,* 



788 Ditto, with '-ml. - - - - ,. - 



18.00 

 4.00 



5.00 

 7.00 

 0.38 



0.56 

 0.75 

 1.25 

 1.75 

 2.50 

 3.25 



9.00 

 0.38 

 1.00 



1.25 



0.25 

 5.00 

 0.75 

 1.75 

 0.50 

 0.50 

 1.75 

 4.00 



4.00 

 1.75 



1.50 



2.25 



3.50 

 1.00 



6.00 



1.00 

 2.00 



